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November 11, 2019 ~ 1 min read

Docker network open ports


Sometimes when one tries to access a port of an application inside of a docker container running in swarm mode one can't access it. For example:

services:
  gaiad:
    image: ${GAIAD_IMAGE}
    deploy:
      mode: replicated
      replicas: 1
    ports:
      - "0.0.0.0:26657:26657"

On localhost when one runs curl -s localhost:26657/health it just stalls and nothing happens.

In this case the docker swarm was using a wg0 interface as the overlay network. So the command should have been curl -s 10.200.200.10:26657/health

REMEMBER

Check which docker network it is being used for the docker swarm


Sebastian BolaƱos

Hi, I'm Sebastian. I'm a software developer from Costa Rica. You can follow me on Twitter. I enjoy working on trustless systems.